1. I was absent from class yesterday because I was sick.
2. Minh is going to the dentist because he has a toothache.
3. She has healthy teeth because she brushes her teeth after every meal.
4. Children have toothache because they often eat a lot of candy.
5. He was happy because his decayding tooth stopped hurting.
6. We jog every morning because it's good for our health.
